Multiple Choice
How many neutrons are present in an atom of 226Ra?
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2. Atoms & Elements
Isotopes
Multiple Choice
An alpha particle is also referred to as the nucleus of which isotope?
A
Helium-4
B
Oxygen-16
C
Carbon-12
D
Hydrogen-1
Verified step by step guidance1
Recall that an alpha particle is a type of ionizing radiation consisting of two protons and two neutrons bound together.
Recognize that the nucleus of an alpha particle corresponds to the nucleus of a specific isotope with 2 protons and 2 neutrons.
Identify the isotope with 2 protons and 2 neutrons, which is Helium-4 (\$^4\(\mathrm{He}\)\$).
Understand that Oxygen-16, Carbon-12, and Hydrogen-1 have different numbers of protons and neutrons and therefore do not correspond to an alpha particle.
Conclude that the alpha particle is the nucleus of the Helium-4 isotope.
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